Definitely the power lift gate and check the infortainment system to be sure it has the navigation option. I just bought a used 2017 titanium model - which didn’t come with the power lift gate and now wish I had kept looking for one with it. It so utterly convenient and likely essential for a senior. The lift gate is rather high up to reach in order to close it manually. I’d need a step stool if I were any shorter and I’m 5’6”! LOL
and be sure to check for the NAV system - on mine, I didn’t even notice that it didn’t have the NAV system before I had my car for a couple of days - turns out that too was optional for the cmax titanium. With a name like that you’d think it were fully loaded.
I am considering both features after market. The nav system looks like it would be 300-800 depending on whether the Nav brain piece is new or used.
the install looks fairly easy.
An after market power lift gate, on the other hand, appears to be a bigger project more pricey project, likely for a professional.